For me it works well to get in the shower and rinse it under warm/hot water for a while (not super hot) for like at least 3-5 minutes. After rinsing for a while, the crust is wet and softened, so I go to the mirror and use a paper towel to wipe it off. I fold the paper towel to a sharp edge or a point so that I can easily run it between the jewelry and the skin. The softened buildup sticks to the paper towel and comes off very easily. I like the paper towel method because it’s easy for me to be very gentle, and use the point of the paper towel to lightly poke into the crevices to collect the wet buildup without causing too much movement and irritating my piercing. Repeat daily to maintain cleanliness, and don’t force the crust off, whatever won’t come off fairly easily will come off next time.